Chemistry Term Vacuum
Vacuum means A space with no matter at all, or as close to none as possible.
Play a free chemistry quiz with 28 important terms that start with V. Choose the correct meaning of each term, get instant feedback and build a stronger chemistry vocabulary one letter at a time.
Every question shows one chemistry term that begins with V, such as Vacuum or Valence. Tap the option that gives the correct meaning. All 28 questions are on this page, so you can scroll, answer and watch your score grow without opening a new page each time.
Vacuum means A space with no matter at all, or as close to none as possible.
Valence means An older name for the combining power of an atom.
Valence bond theory means The model that explains covalent bonds as the overlap of half-filled atomic orbitals.
Valence electron means An electron in the outermost shell of an atom, the one that takes part in bonding.
Valence shell means The outermost electron shell of an atom.
Valency means The number of bonds an atom can form, its combining power.
Vanadium means A hard transition metal used to strengthen steel, with compounds that change colour as they oxidise.
Van der Waals forces means The weak attractions between molecules caused by temporary and permanent dipoles.
Vanillin means The phenolic aldehyde that gives vanilla its flavour.
Van't Hoff factor means The number of particles one formula unit produces when it dissolves.
Vapour means The gaseous form of a substance that is normally liquid or solid.
Vapour density means The density of a gas compared with hydrogen, used to find molecular mass.
Vapour pressure means The pressure exerted by a vapour in equilibrium with its liquid.
Vaseline means Petroleum jelly, a soft mixture of waxy hydrocarbons from crude oil.
Vegetable oil means Oil pressed from seeds or fruits, made of triglycerides that are liquid at room temperature.
Vinegar means A dilute solution of ethanoic acid made by fermenting ethanol.
Vinyl means The CH2=CH- group that forms PVC when polymerised with chlorine.
Vitamin means An organic compound needed in tiny amounts for the body to work properly.
Viscosity means A liquid's resistance to flowing, high in honey and low in petrol.
Vitreous means Describes a glassy, amorphous solid made by cooling a melt too fast to crystallise.
Volatile means Describes a liquid that evaporates easily because of its high vapour pressure.
Volatility means How readily a substance evaporates.
Volt means The SI unit of electric potential difference.
Voltaic cell means A cell that generates electricity from a spontaneous chemical reaction.
Volume means The amount of three-dimensional space a substance fills.
Volumetric analysis means Finding concentration by measuring volumes, especially by titration.
Volumetric flask means A flask with a single calibration mark that holds one exact volume.
Vulcanisation means Heating rubber with sulfur so cross-links form, making it hard-wearing and elastic.
You have answered 0 of 28 questions. Finish the quiz to see your final score and chemistry level.
Back to the Quiz ↑Use this list to check your answers and to revise. It shows all 28 terms that start with V from the quiz, each with its meaning. Read a row, make a short sentence that uses the term, then cover the right-hand column and test yourself.
| # | Term | Meaning |
|---|---|---|
| 1 | Vacuum | A space with no matter at all, or as close to none as possible |
| 2 | Valence | An older name for the combining power of an atom |
| 3 | Valence bond theory | The model that explains covalent bonds as the overlap of half-filled atomic orbitals |
| 4 | Valence electron | An electron in the outermost shell of an atom, the one that takes part in bonding |
| 5 | Valence shell | The outermost electron shell of an atom |
| 6 | Valency | The number of bonds an atom can form, its combining power |
| 7 | Vanadium | A hard transition metal used to strengthen steel, with compounds that change colour as they oxidise |
| 8 | Van der Waals forces | The weak attractions between molecules caused by temporary and permanent dipoles |
| 9 | Vanillin | The phenolic aldehyde that gives vanilla its flavour |
| 10 | Van't Hoff factor | The number of particles one formula unit produces when it dissolves |
| 11 | Vapour | The gaseous form of a substance that is normally liquid or solid |
| 12 | Vapour density | The density of a gas compared with hydrogen, used to find molecular mass |
| 13 | Vapour pressure | The pressure exerted by a vapour in equilibrium with its liquid |
| 14 | Vaseline | Petroleum jelly, a soft mixture of waxy hydrocarbons from crude oil |
| 15 | Vegetable oil | Oil pressed from seeds or fruits, made of triglycerides that are liquid at room temperature |
| 16 | Vinegar | A dilute solution of ethanoic acid made by fermenting ethanol |
| 17 | Vinyl | The CH2=CH- group that forms PVC when polymerised with chlorine |
| 18 | Vitamin | An organic compound needed in tiny amounts for the body to work properly |
| 19 | Viscosity | A liquid's resistance to flowing, high in honey and low in petrol |
| 20 | Vitreous | Describes a glassy, amorphous solid made by cooling a melt too fast to crystallise |
| 21 | Volatile | Describes a liquid that evaporates easily because of its high vapour pressure |
| 22 | Volatility | How readily a substance evaporates |
| 23 | Volt | The SI unit of electric potential difference |
| 24 | Voltaic cell | A cell that generates electricity from a spontaneous chemical reaction |
| 25 | Volume | The amount of three-dimensional space a substance fills |
| 26 | Volumetric analysis | Finding concentration by measuring volumes, especially by titration |
| 27 | Volumetric flask | A flask with a single calibration mark that holds one exact volume |
| 28 | Vulcanisation | Heating rubber with sulfur so cross-links form, making it hard-wearing and elastic |
Learning chemistry terms alphabetically is a simple way to stay organised. When you study one letter at a time, you meet a manageable group of terms, you can track your progress and you can see how many of them you already know. This quiz focuses on terms starting with V that are useful in class, in the lab and in exams, including Vacuum (A space with no matter at all, or as close to none as possible), Valence (An older name for the combining power of an atom), Valence bond theory (The model that explains covalent bonds as the overlap of half-filled atomic orbitals), Valence electron (An electron in the outermost shell of an atom, the one that takes part in bonding), Valence shell (The outermost electron shell of an atom), Valency (The number of bonds an atom can form, its combining power).
Chemistry has far fewer common terms that begin with V than with letters such as C, P or S. That is why this page has 28 questions instead of 50. Every term included here is a genuine chemistry term that is worth learning.
Many V terms name the apparatus on the bench, such as burettes, pipettes, flasks and furnaces. Knowing exactly what each one does makes practical work and diagrams much easier.
Some terms in this quiz name the big ideas of chemistry, such as the mole, valency, bonding and equilibrium. Understanding them helps you follow explanations and solve problems faster.
Definitions are asked directly in school tests, GCSE, SAT Chemistry and entrance exams. Practising by letter gives you steady, focused revision.
Chemistry is the branch of science that studies what substances are made of, how they behave and how they change into other substances. The word comes from alchemy, the ancient craft that dreamed of turning cheap metals into gold, because early chemists slowly turned that dream into real knowledge. Chemistry explains why iron rusts, how soap lifts grease, why leaves are green and how a battery stores energy in its chemicals.
Chemistry connects the invisible world of atoms to everything you can see and touch. Biology runs on the chemistry of proteins and DNA, physicists explain the behaviour of the atoms chemists rearrange, and every medicine, fertiliser, plastic and phone screen exists because someone understood the chemistry inside it. Learning the vocabulary of chemistry is the first step to understanding all of these ideas, and this quiz trains exactly that.
| Term | Meaning | Example in a sentence |
|---|---|---|
| Mixture | substances mixed together but not chemically joined | Sea water is a mixture of salt and many other substances. |
| Solution | one substance spread evenly through another | Sugar disappears in tea because it forms a solution. |
| Catalyst | a substance that speeds up a reaction without being used up | Enzymes are natural catalysts in your body. |
| Valency | the number of bonds an atom can form | Carbon has a valency of four, which is why it builds so many compounds. |
Chemists group the subject into a few big branches. Knowing them helps you see how the terms in this quiz fit together.
The chemistry of carbon compounds, from fuels, plastics and dyes to medicines and the molecules of living things. Alkanes, alcohols, esters and polymers all live here.
The chemistry of everything else: metals, minerals, salts, acids and alkalis. This branch explains blast furnaces, fertilisers, gemstones and the tests done on the lab bench.
Physical chemistry studies energy, reaction rates and equilibrium; analytical chemistry measures what is present and how much. Biochemistry and green chemistry build on all three.
When two options both look possible, work through these steps before you answer.
Some chemistry words carry more than one meaning, and the right definition depends on the context. Salt means any ionic compound made from an acid and a base, but in the kitchen it means only sodium chloride. Organic means a carbon compound in the laboratory, but organic food on a shop shelf means grown without synthetic chemicals. Always picture the term inside its chemistry topic before you choose.
In chemistry, any compound made when an acid neutralises a base; at the table, only sodium chloride. Same word, two different ideas.
Organic chemistry studies carbon compounds, whether or not anything ever lived; organic food means grown without synthetic pesticides or fertilisers.
A chemistry solution is one substance spread evenly through another, like sugar in tea — not the answer to a puzzle.
In chemistry a base accepts hydrogen ions and pairs with an acid; the everyday word means a foundation or headquarters.
Chemists write every element as one or two letters, so learning the symbols is like learning an alphabet. Some are simple, but many come from old Latin names, which is why sodium is Na and potassium is K. Learn these twenty-one and you can read almost any formula. One warning: the case of the letters matters — Co is cobalt, but CO is carbon monoxide, and neither is the same as CO2.
| Symbol | Element | Why this symbol | Where you meet it |
|---|---|---|---|
| H | Hydrogen | The first letter of its English name | Water is H2O |
| C | Carbon | The first letter of its English name | Diamond and graphite are carbon |
| N | Nitrogen | The first letter of its English name | About 78% of the air is N2 |
| O | Oxygen | The first letter of its English name | Needed for burning and breathing |
| Na | Sodium | From natrium, its old Latin name | Table salt is NaCl |
| Mg | Magnesium | From Magnesia, an ancient Greek region | Burns with a blinding white flame |
| Al | Aluminium | The first two letters of its name | Drink cans are made from it |
| Si | Silicon | From silex, the Latin word for flint | Sand, glass and computer chips |
| P | Phosphorus | The first letter of its English name | On the striker strip of a matchbox |
| S | Sulfur | The first letter of its English name | A yellow element with a rotten-egg smell |
| Cl | Chlorine | From chloros, the Greek for pale green | Kills germs in swimming pools |
| K | Potassium | From kalium, its old Latin name | Bananas are rich in it |
| Ca | Calcium | From calx, the Latin word for lime | Chalk, bones and teeth |
| Fe | Iron | From ferrum, its old Latin name | Rust is iron oxide |
| Cu | Copper | From cuprum, the Latin name for Cyprus | Used in electrical wires |
| Zn | Zinc | From the German word zink | Coats steel to stop it rusting |
| Ag | Silver | From argentum, its old Latin name | Jewellery, mirrors and coins |
| Sn | Tin | From stannum, its old Latin name | Coats steel food cans |
| Au | Gold | From aurum, meaning shining dawn | Wedding rings and jewellery |
| Hg | Mercury | From hydrargyrum, meaning water-silver | The only liquid metal at room temperature |
| Pb | Lead | From plumbum, its old Latin name | Old water pipes were made of it |
Direct “state the meaning of” and definition questions appear in nearly every school chemistry paper, and the same vocabulary skills appear indirectly in structured questions, data analysis and multiple-choice sections of exams such as GCSE, SAT Chemistry, NET and JEE.
Fifteen to twenty minutes a day is enough. Follow this plan, then move on to the next letter.
Teachers, tutors and parents can turn this letter quiz into a longer learning session with these simple ideas.
Write terms on one set of cards and their meanings on another. Students race to match the pairs, then sort them into elements, compounds, mixtures, apparatus and laws.
Pick five terms from the letter and show each one with a quick, safe demo — a flame test for metals, limewater for carbon dioxide, or iodine subliming gently on a watch glass.
Open this page on a projector, split the class into teams and award a point for each correct answer. The sticky score bar makes tracking easy.
Focus on one letter each week. Add the new terms to a word wall with the meaning beside each one — and the formula or an example in a second column.
This page has 28 questions, all on one page and split into 3 sets of up to 10. Each question shows a chemistry term that starts with V and four options; you choose the option with the correct meaning.
Only a small number of common chemistry terms begin with V. Instead of filling the quiz with rare or invented words, this page includes 28 real terms that are worth learning.
Terms you will practise here include Vacuum (A space with no matter at all, or as close to none as possible), Valence (An older name for the combining power of an atom), Valence bond theory (The model that explains covalent bonds as the overlap of half-filled atomic orbitals), Valence electron (An electron in the outermost shell of an atom, the one that takes part in bonding), Valence shell (The outermost electron shell of an atom), Valency (The number of bonds an atom can form, its combining power), and many more. Each one is a term that appears often in school books, exam papers and everyday chemistry.
Chemistry is the branch of science that studies what substances are made of, how they behave and how they change into other substances. It explains why iron rusts, how soap lifts grease, why leaves are green and how a battery stores energy, from single atoms to whole factories.
No. This quiz focuses on understanding what each term means, not on calculations. Knowing the definitions and the ideas behind them will make balancing equations and doing calculations much easier later on.
Yes. It is completely free, needs no sign-up and you can retake it as many times as you like.
Yes. Press the Reset Quiz button in the score bar to clear your answers and start again. Your best score for this letter is remembered on this device.
Study a few terms at a time, say each definition aloud, write one formula or example for each term, and use the answer key on this page for revision. Come back after one day, three days and one week to repeat the quiz.
School students, science learners and anyone preparing for exams such as GCSE, SAT Chemistry, NET, JEE or other competitive tests. Teachers and parents can also use it as a quick classroom or homework activity.
Use the A to Z letter bar at the top and bottom of this page. Every letter has its own chemistry quiz page.
You have practised chemistry terms that start with V. Replay the quiz to improve your score, then continue with another letter to cover the whole alphabet.
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